Case report 407: Sternocostoclavicular hyperostosis affecting the sternum, medial ends of the clavicles and upper segments of the anterior ribs.
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The rate of pseudarthrosis in 726 conservatively treated fractures of the clavicula was 0.69%. The danger of hyperporoses lies in neurovascular compression. Errors in treatment pertain to wrong operative indications and inadequate osteosyntheses. Surgery should be performed only in 2nd and 3rd degree open fractures and/or concomitant neurovascular lesions (2.06%), in distal fracture dislocations with instability of the AC-joint (1.6%) and in cases of painful pseudarthrosis (n = 46). The implant of choice is the 3.5 DCP. Six cortical contacts must be achieved in each fragment.
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Symmetrical clavicular widening was observed in a boy with mosaic trisomy for chromosome 8. This sign may be considered in conjunction with other clinical and radiographic features as an indication for chromosomal studies.
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Computed tomography scans originally obtained to assess the ossification status of the medial clavicular epiphyses of 40 live subjects for forensic age estimation purposes were analysed. From the data acquired we reconstructed images with slice thicknesses of 1, 3, 5 and 7 mm, and based on the classification of stages by Schmeling et al. (Int J Legal Med 118:5-8, 2004), we determined the ossification stage for each reconstructed slice thickness, separately for both sides. Of the 80 clavicular epiphysial plates examined, seven displayed slice-thickness-dependent differences at certain ossification stages. In one case a slice thickness of 1 mm led to a different diagnosis of the ossification stage than a slice thickness of 3 mm, in three cases the diagnoses differed between the slice thicknesses of 3 and of 5 mm, and in another three cases, between 5 and 7 mm. We therefore conclude that for age estimation purposes, the slice thickness should be 1 mm to ensure maximum accuracy and diagnostic reliability.
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